Not being an electrical person, I only have the ICC 1&2 Family dwelling code.
4202.5:
Multioutlet branch circutis shall be limited to a maximum branch-circuit rating of 20 amperes.
This appears to be a big (50amp v 20amp) waiver.
I guess the proper trade off might be a long power cable v. long welding leads.
I would put a 20' or 30' power cable on.
